Mine's been looking a bit translucent at the leaf tips lately, and I'm wondering if it's a mineral buildup thing or just thirsty

Mine's been looking a bit translucent at the leaf tips lately, and I'm wondering if it's a mineral buildup thing or just thirsty? I've got seven plants total and this is the only one doing it. It's Spathiphyllum wallisii, pretty standard care, but our water here is quite hard. Has anyone else noticed this with theirs, or am I overthinking it? Still learning how to read what they're actually asking for.